This is a very important question! I am glad you asked.
I think that pollution is critical as a risk to reproduction. It is possible that fertility can be affected by a build up of medicine in water supplies, there are also possible links between pesticides and cancer. Air pollution has been linked with birth defects.
The effects of our environment on our health and reproduction is very important, and I believe it is a very important subject. I think we need to do more to reduce environmental pollutants, through safer plastics (BPA-free), safer pesticides, more renewable technologies, and more responsible use of medical drugs.
Humans are very good at adaptation, and we do learn when things affect us negatively, but it also requires people to take action and help make a change to how we live.